Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f8b9035037c5c7…

MALICIOUS

PDF

65.8 KB Created: 2020-12-21 08:34:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dce475fc6913bf18be59477a43f2c34f SHA-1: ae7e43b714469e4252d38d1a95121a34dcdac134 SHA-256: d3f8b9035037c5c70c1fe63c290d90f3cfb2a9569c76735143640e256a20b96a
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'trafffe.ru' and multiple Weebly-hosted PDF URLs suggests the document is designed to trick the user into downloading a secondary payload. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the phishing lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafffe.ru/strik?utm_term=checkers+game+2+player+free PDF link annotation
    • https://wobanavemo.weebly.com/uploads/1/3/4/0/134096337/gokoxo.pdfIn PDF document text
    • https://xuzufudoroxibu.weebly.com/uploads/1/3/4/7/134755415/5349216.pdfIn PDF document text
    • https://xogosikeduvad.weebly.com/uploads/1/3/4/6/134669078/mamalow.pdfIn PDF document text
    • https://volufijipezuji.weebly.com/uploads/1/3/4/7/134703795/gijivoreva.pdfIn PDF document text
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/musixurubeparul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sajezife/a_m_b_u_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/the_autonomous_power_of_the_state.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fa208ef7301f8b1117d5/t/5fc99d7dec1d586fb386f108/1607048574914/tuvegufukuzonononub.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/bundesliga_2_league_form_table.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/drosophila_genetics_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/dewemaw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC501 5632 bytes
SHA-256: 2d39806bf617fc3682e9163483c772b706fcb6dd19ed2801e4df4a54e0006187
font_01_sfnt_off0000d812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD812 10192 bytes
SHA-256: a7f96f2182cb9b2f836a6b36fa79fde6691ce1c38697b3fd6429723774c11a29

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